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<div class="title">SparseLU_Memory.h</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// This file is part of Eigen, a lightweight C++ template library</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// for linear algebra.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Copyright (C) 2012 Désiré Nuentsa-Wakam &lt;desire.nuentsa_wakam@inria.fr&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// This Source Code Form is subject to the terms of the Mozilla</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// Public License v. 2.0. If a copy of the MPL was not distributed</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160; </div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">/* </span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> </span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * NOTE: This file is the modified version of [s,d,c,z]memory.c files in SuperLU </span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> </span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * -- SuperLU routine (version 3.1) --</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * Univ. of California Berkeley, Xerox Palo Alto Research Center,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> * and Lawrence Berkeley National Lab.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> * August 1, 2008</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> * Copyright (c) 1994 by Xerox Corporation.  All rights reserved.</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"> * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"> * EXPRESSED OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"> * Permission is hereby granted to use or copy this program for any</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment"> * purpose, provided the above notices are retained on all copies.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment"> * Permission to modify the code and to distribute modified code is</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment"> * granted, provided the above notices are retained, and a notice that</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> * the code was modified is included with the above copyright notice.</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160; </div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#ifndef EIGEN_SPARSELU_MEMORY</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#define EIGEN_SPARSELU_MEMORY</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &quot;./InternalHeaderCheck.h&quot;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160; </div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceEigen.html">Eigen</a> {</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;  </div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="keyword">enum</span> { LUNoMarker = 3 };</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="keyword">enum</span> {emptyIdxLU = -1};</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">inline</span> <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> LUnumTempV(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; m, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; w, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; t, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; b)</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;{</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;  <span class="keywordflow">return</span> (std::max)(m, (t+b)*w);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;}</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160; </div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="keyword">template</span>&lt; <span class="keyword">typename</span> Scalar&gt;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="keyword">inline</span> <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> LUTempSpace(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp;m, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; w)</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;{</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;  <span class="keywordflow">return</span> (2*w + 4 + LUNoMarker) * m * <span class="keyword">sizeof</span>(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>) + (w + 1) * m * <span class="keyword">sizeof</span>(Scalar);</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;}</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160; </div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160; </div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160; </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Scalar, <span class="keyword">typename</span> StorageIndex&gt;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> VectorType&gt;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>  SparseLUImpl&lt;Scalar,StorageIndex&gt;::expand(VectorType&amp; vec, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; length, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> nbElts, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> keep_prev, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; num_expansions) </div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;{</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;  </div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;  <span class="keywordtype">float</span> alpha = 1.5; <span class="comment">// Ratio of the memory increase </span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> new_len; <span class="comment">// New size of the allocated memory</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;  </div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="keywordflow">if</span>(num_expansions == 0 || keep_prev) </div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    new_len = length ; <span class="comment">// First time allocate requested</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  <span class="keywordflow">else</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    new_len = (std::max)(length+1,<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>(alpha * length));</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  </div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  VectorType old_vec; <span class="comment">// Temporary vector to hold the previous values   </span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;  <span class="keywordflow">if</span> (nbElts &gt; 0 )</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    old_vec = vec.segment(0,nbElts); </div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;  </div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;  <span class="comment">//Allocate or expand the current vector</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">#ifdef EIGEN_EXCEPTIONS</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;  <span class="keywordflow">try</span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  {</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    vec.resize(new_len); </div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;  }</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="preprocessor">#ifdef EIGEN_EXCEPTIONS</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  <span class="keywordflow">catch</span>(std::bad_alloc&amp; )</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;  <span class="keywordflow">if</span>(!vec.size())</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;#endif</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;  {</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    <span class="keywordflow">if</span> (!num_expansions)</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    {</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;      <span class="comment">// First time to allocate from LUMemInit()</span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;      <span class="comment">// Let LUMemInit() deals with it.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;      <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    }</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="keywordflow">if</span> (keep_prev)</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    {</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;      <span class="comment">// In this case, the memory length should not not be reduced</span></div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;      <span class="keywordflow">return</span> new_len;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    }</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    <span class="keywordflow">else</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    {</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;      <span class="comment">// Reduce the size and increase again </span></div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;      <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> tries = 0; <span class="comment">// Number of attempts</span></div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;      <span class="keywordflow">do</span> </div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;      {</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        alpha = (alpha + 1)/2;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        new_len = (std::max)(length+1,<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>(alpha * length));</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;<span class="preprocessor">#ifdef EIGEN_EXCEPTIONS</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        <span class="keywordflow">try</span></div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        {</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;          vec.resize(new_len); </div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        }</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<span class="preprocessor">#ifdef EIGEN_EXCEPTIONS</span></div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;        <span class="keywordflow">catch</span>(std::bad_alloc&amp; )</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        <span class="keywordflow">if</span> (!vec.size())</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;#endif</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;        {</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;          tries += 1; </div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;          <span class="keywordflow">if</span> ( tries &gt; 10) <span class="keywordflow">return</span> new_len; </div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;        }</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;      } <span class="keywordflow">while</span> (!vec.size());</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;    }</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;  }</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;  <span class="comment">//Copy the previous values to the newly allocated space </span></div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;  <span class="keywordflow">if</span> (nbElts &gt; 0)</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    vec.segment(0, nbElts) = old_vec;   </div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;   </div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;  </div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;  length  = new_len;</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;  <span class="keywordflow">if</span>(num_expansions) ++num_expansions;</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;  <span class="keywordflow">return</span> 0; </div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;}</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160; </div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Scalar, <span class="keyword">typename</span> StorageIndex&gt;</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> SparseLUImpl&lt;Scalar,StorageIndex&gt;::memInit(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> m, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> n, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> annz, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> lwork, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> fillratio, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> panel_size,  GlobalLU_t&amp; glu)</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;{</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;  <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; num_expansions = glu.num_expansions; <span class="comment">//No memory expansions so far</span></div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;  num_expansions = 0;</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;  glu.nzumax = glu.nzlumax = (std::min)(fillratio * (annz+1) / n, m) * n; <span class="comment">// estimated number of nonzeros in U </span></div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;  glu.nzlmax = (std::max)(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>(4), fillratio) * (annz+1) / 4; <span class="comment">// estimated  nnz in L factor</span></div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;  <span class="comment">// Return the estimated size to the user if necessary</span></div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;  <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> tempSpace;</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;  tempSpace = (2*panel_size + 4 + LUNoMarker) * m * <span class="keyword">sizeof</span>(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>) + (panel_size + 1) * m * <span class="keyword">sizeof</span>(Scalar);</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;  <span class="keywordflow">if</span> (lwork == emptyIdxLU) </div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;  {</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> estimated_size;</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    estimated_size = (5 * n + 5) * <span class="keyword">sizeof</span>(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>)  + tempSpace</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;                    + (glu.nzlmax + glu.nzumax) * <span class="keyword">sizeof</span>(<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>) + (glu.nzlumax+glu.nzumax) *  <span class="keyword">sizeof</span>(Scalar) + n; </div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    <span class="keywordflow">return</span> estimated_size;</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;  }</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;  </div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;  <span class="comment">// Setup the required space </span></div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;  </div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;  <span class="comment">// First allocate Integer pointers for L\U factors</span></div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;  glu.xsup.resize(n+1);</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;  glu.supno.resize(n+1);</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;  glu.xlsub.resize(n+1);</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;  glu.xlusup.resize(n+1);</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;  glu.xusub.resize(n+1);</div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160; </div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;  <span class="comment">// Reserve memory for L/U factors</span></div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;  <span class="keywordflow">do</span> </div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;  {</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    <span class="keywordflow">if</span>(     (expand&lt;ScalarVector&gt;(glu.lusup, glu.nzlumax, 0, 0, num_expansions)&lt;0)</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;        ||  (expand&lt;ScalarVector&gt;(glu.ucol,  glu.nzumax,  0, 0, num_expansions)&lt;0)</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;        ||  (expand&lt;IndexVector&gt; (glu.lsub,  glu.nzlmax,  0, 0, num_expansions)&lt;0)</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;        ||  (expand&lt;IndexVector&gt; (glu.usub,  glu.nzumax,  0, 1, num_expansions)&lt;0) )</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    {</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;      <span class="comment">//Reduce the estimated size and retry</span></div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;      glu.nzlumax /= 2;</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;      glu.nzumax /= 2;</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;      glu.nzlmax /= 2;</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;      <span class="keywordflow">if</span> (glu.nzlumax &lt; annz ) <span class="keywordflow">return</span> glu.nzlumax; </div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    }</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;  } <span class="keywordflow">while</span> (!glu.lusup.size() || !glu.ucol.size() || !glu.lsub.size() || !glu.usub.size());</div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;  </div>
<div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;  ++num_expansions;</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;  </div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;} <span class="comment">// end LuMemInit</span></div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160; </div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Scalar, <span class="keyword">typename</span> StorageIndex&gt;</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> VectorType&gt;</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;<a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> SparseLUImpl&lt;Scalar,StorageIndex&gt;::memXpand(VectorType&amp; vec, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; maxlen, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> nbElts, MemType memtype, <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a>&amp; num_expansions)</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;{</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;  <a class="code" href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Index</a> failed_size; </div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;  <span class="keywordflow">if</span> (memtype == USUB)</div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;     failed_size = this-&gt;expand&lt;VectorType&gt;(vec, maxlen, nbElts, 1, num_expansions);</div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;    failed_size = this-&gt;expand&lt;VectorType&gt;(vec, maxlen, nbElts, 0, num_expansions);</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160; </div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;  <span class="keywordflow">if</span> (failed_size)</div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;    <span class="keywordflow">return</span> failed_size; </div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;  </div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;  <span class="keywordflow">return</span> 0 ;  </div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;}</div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160; </div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;} <span class="comment">// end namespace internal</span></div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160; </div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;} <span class="comment">// end namespace Eigen</span></div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;<span class="preprocessor">#endif </span><span class="comment">// EIGEN_SPARSELU_MEMORY</span></div>
<div class="ttc" id="anamespaceEigen_html"><div class="ttname"><a href="namespaceEigen.html">Eigen</a></div><div class="ttdoc">Namespace containing all symbols from the Eigen library.</div><div class="ttdef"><b>Definition:</b> Core:139</div></div>
<div class="ttc" id="anamespaceEigen_html_a62e77e0933482dafde8fe197d9a2cfde"><div class="ttname"><a href="namespaceEigen.html#a62e77e0933482dafde8fe197d9a2cfde">Eigen::Index</a></div><div class="ttdeci">EIGEN_DEFAULT_DENSE_INDEX_TYPE Index</div><div class="ttdoc">The Index type as used for the API.</div><div class="ttdef"><b>Definition:</b> Meta.h:59</div></div>
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